The bit I struggle with is how one moment there's an altercation and next moment someone making phone calls to the pub. If this was coerced I can't see how, and did Kipper really come out equipped with lots of 5p and 10p coins for 'phone boxes?
Many thanks for posting this KC. So we now know contemporaneously and not solely from DL that SJL was at home. If they chatted about inconsequential stuff for "a couple of hours", they can't have started to do so much later than 10pm, given he was planning to leave for work by 7.45.
So when did this supposed call with AL happen? She clearly did not make it from the flat. If she made it from a call box to AL before getting home latest 10pm, he'd know from the pips and the background noise that she was in a call box. So he would remember who had called whom, contrary to what was later said.
Where's the room in the timeline for her to have been anywhere else than her parents' place? Is this impossible phone call the thing only the perp would know had not happened?